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CARBONATE ALKALINITY IN THE PORE WATERS OF ANOXIC MARINE SEDIMENTS 1
Author(s) -
Berner Robert A.,
Scott Martha R.,
Thomlinson Catherine
Publication year - 1970
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1970.15.4.0544
Subject(s) - alkalinity , anoxic waters , authigenic , carbonate , environmental chemistry , sulfate , aluminosilicate , organic matter , fjord , geology , dissolved organic carbon , seawater , chemistry , oceanography , mineralogy , biochemistry , catalysis , organic chemistry
The principal factor affecting carbonate alkalinity in pore waters of organic‐rich aluminosilicate muds from the central Connecticut coast and a Maine fjord is bacterial sulfate reduction. Measured (titration) alkalinity is equal to that calculated from measured changes in SO 4 2− , Mg 2+ , Ca 2+ , and NH 4 + . As a result of alkalinity increase, pore waters of anoxic sediments can become highly supersaturated with CaCO 3 . Precipitation of Ca.CO 3 may not occur, however, possibly because of the inhibiting effect of dissolved organic matter. No evidence is provided by these sediments for authigenic aluminosilicate formation.